The background image for the profile, base64-encoded. Must be a valid GIF, JPG,
or PNG image of less than 800 kilobytes in size. Images with width larger than
2048 pixels will be forcibly scaled down. The image must be provided as raw
multipart data, not a URL.

tile

optional

Whether or not to tile the background image. If set to true , t or 1 the
background image will be displayed tiled. The image will not be tiled otherwise.

include_entities

optional

The entities node will not be included when set to false .

false

skip_status

optional

When set to either true , t or 1 statuses will not be included in the
returned user objects.

media_id

optional

Specify the media to use as the background image. More information on upload of
media is available here .